Board Thread:General Discussion/@comment-26222858-20150917141812/@comment-6769189-20151022120029

As Dante matures his DT looks a bit more like the Majin Form each time. When he is close to dying, his body goes into a panic mode and temporarily brings out his strongest form, like a demon adrenaline rush.

Kind of like Inuyasha's psycho full demon mode. If you have seen/read Inuyasha.